Perhaps this is an appropriate time to introduce the concept of overwhelming evidence, for those not familiar.
since no one alive can legitimately claim first hand knowledge, historians must rely on second hand information to derive at what is considered the most probable truth. Overwhelming evidence plays an important role in this determination. This means that even if a document if discovered and found to be authentic, it would not change history if the information in that document was logically questionable. An analysis of UFO claims by ancients is an example.
there may have been UFO’s, or saucers in Biblical times, but it also could be that the writers of historic accounts then could just as easily have been making it up, or wrong, on drugs, whatever. It takes much more than one tiny piece of obscure evidence to change the course of historic opinion, thats just the way it is.